

🔵 Seal like a pro, last like a legend!
RectorSeal Tru-Blu 31551 is a fast-drying, PTFE-enriched pipe thread sealant designed for professional plumbers and tradespeople. Made in the USA, it offers flexible, vibration-resistant sealing across a wide range of pipe materials, ensuring leak-proof joints in industrial, HVAC, and home improvement applications. Its lead-free, metal-free formula lubricates threads for easy installation and adjustment, making it a trusted choice for durable, reliable plumbing solutions.









| ASIN | B002BY02PQ |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #26,218 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #36 in Industrial Thread Sealants |
| Color | Blue |
| Customer Reviews | 4.6 4.6 out of 5 stars (364) |
| Date First Available | June 19, 2009 |
| Included Components | Unit^Instruction Guide |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 0.16 ounces |
| Item model number | 31551 |
| Manufacturer | The Rectorseal Corporation |
| Material | Plastic |
| Part Number | 31551 |
| Product Dimensions | 2.5 x 2.5 x 3.6 inches |
| Size | 8 Oz. |
| Style | Industrial |
| Warranty Description | Manufacturer |
Q**E
Seals threads like it should
Works great. Seals like it should. Easy to apply, and enough for lots of fittings. I got tired of finding shreds of Teflon tape clogging orifices, so went back to paste sealant. It doesn't dry out, and allows some adjustment of the fitting after assembly, while lubing and sealing the threads.
J**R
Incredible
I have been in the water system business for 18 years and have used Teflon tape, Megaloc, and StickTite paste. I have found Megaloc to be the best. It’s always been my sure thing with Teflon tape on difficult joints, but I finally ran into one that my tried and true failed me for the first time. It was a 1-1/4” size and I was screwing brass into a plastic filter housing. I tried 3 times with Megaloc and a couple times with StickTite plumber paste and even gave it time to dry. To my surprise each attempt failed. I have never used True Blue since I have been loyal to Megaloc since it’s never failed me until now. I ordered this stuff and gave it a try. It worked on the first attempt. I put True Blue in the threads and on the threads of the male and let it try for almost 24 hrs. No leaks several days later. I’m convinced and will be using it from here on.
D**E
sticks well on pvc pipe thread
great product seals pvc thread no leaks
Y**A
Exactly as advertised
Exactly as advertised - forms a vey good seal, especially when used along with Teflon tape
B**N
Good product.
Works as design. Good product.
B**N
Best I’ve found
My pipe dope failed so I borrowed my dads and this stuff works great. I’ve used it on 1/2 all the way up to 3” fittings with success. My dad got put onto it from an ag sprayer parts store where it has to hold up to 180+ psi, bouncing through fields at 10mph, and large fittings.
7**E
Effective, Easy to Apply Pipe Fitting Sealant
Tru-Blu is much easier to apply than Rectorseal's T-2 sealant I've used previously, which got on/in everything it touched leaving a film that just doesn't clean way. I applied a very light coat of Tru-Blu over 3 wraps of Mill-Rose 70886 Blue Monster 3/4" teflon tape. My 1" red brass pipe fittings came together with ease and I was able to wipe away the excess sealant without difficulty, leaving a clean professional looking joint. I'm pleased. A little does it; I should have opted for the smaller 1/4 pint size.
I**E
Good quality/value pipe thread sealant
It's good value yet quality pipe thread sealant. Much rather pay this price than some that are nearly the same yet cost 2-4x more. First photo was the only problem, but is more of a mistake by somebody. Not sure why I received it opened and with some leakage, but it didn't affect the product so I'm happy overall. Mistakes happen and hopefully this will not be a frequent problem or maybe it should be packaged better. Duno. Recommended nonetheless.
A**S
Muito bom
C**N
Tuyau
M**N
Great product
R**D
GOOD PRODUCT
E**E
Stop the leak in my pipe..
Trustpilot
1 week ago
2 weeks ago